Design and Simulation of a New Plasmonic Nano-Sensor to Measure the 87Rb Cooled Atomic Density

Document Type : Original Article

Authors

1 Master's degree, Imam Hussein (AS) University, Tehran, Iran

2 Assistant Professor, Imam Hossein (AS) University, Tehran, Iran

Abstract

In this paper a novel plasmonic sensor for measuring the density of cold 87Rb atoms is proposed that it is analyzed and simulated using the Density matrix and FDTD method. The sensor detects the density of cold 87Rb atoms by changes in the reflectance of the structure. The mechanism of this sensor is based on the variation of refractive index with the atomic density. The proposed structure consists of metal gold (with thickness 35nm)-indium tin oxide (with thickness 220 nm) - MgF2 (with thickness 5 nm) and cold 87Rb atomic medium. The results showed that the indium tin oxide metal oxide layer plays an important role in the sensor parameters. By optimizing the thicknesses of the metal oxide and choosing the arrangement layers, the maximum sensitivity and Figure of merit of and  for the GGIMA structure can be achieved, respectively. The structure proposed is able to open a new window for cooled atoms of alkali metals detection and characterization which are useful for quantum technology such as cold atomic clocks, quantum RF receivers based on cold atoms and quantum navigation systems.

Keywords

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References

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Applied Electromagnetics
Volume 13, Issue 1 - Serial Number 30
Spring and Summer
September 2025
Pages 13-25

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History

  • Receive Date: 10 February 2025
  • Revise Date: 27 March 2025
  • Accept Date: 04 May 2025
  • Publish Date: 21 May 2025

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